下列每组物体中都是导体的选项是().
A.氧化铜、硒
B.陶瓷、塑料
C.大地、石墨
D.锗、硅
参考答案:C
Only when he was refused by the interviewer ____ the importance of knowing English.
A.was he fully aware of
B.he was fully aware of
C.was fully he aware of
D.he fully was aware of
简述传染性非典型肺炎的预防措施。